Microsoft officially launched Windows Vista for volume licensing on
November 30. The company also simultaneously launched Office 2007 giving
Microsoft a 1-2 punch in the realm of operating systems and productivity
suites.

"These are game-changing products," said Microsoft
CEO Steve Ballmer at the launch. "It’s an incredible step forward for
business computing in a year of unprecedented innovation from Microsoft. We
expect that more than 200 million people will be using at least one of these
products by the end of 2007."

According to Microsoft’s Robert Hensing, "[ReadyBoost]
uses an AES 128 key that is generated once per OS start (the data in the file
on the thumb drive is encrypted with this key) . . . the key isn't persisted
anywhere (i.e. it lives in memory only) and so apparently when you sleep /
hibernate - the key goes bye bye and thus you need to rebuild your 2GB
ReadyBoost cache on your USB disk when you resume again."

Hensing continues, "Vista realizes that it needs to
regenerate the ReadyBoost cache as soon as it wakes up and loads the USB
drivers and realizes the ReadyBoost drive is plugged in and it starts helpfully
doing this as soon as it can . . . ya know - while the OS is trying to page all
that memory back into my 2GB of system RAM as well and generally restore the OS
to a working state. . . sigh . .
."

The changes made to ReadyBoost in SP1 will ensure that cache
data is reused during S3/S4 sleep so that 'Readyboost.sfcache' is not
repopulated on resume.

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